This model provides a simple way to store your stuff under the Creality K1 Max. I guess it'll fit the K1 as well or anything that has a clearance of 18 mm or 2 Gridfinity height units beneath.
The drawer is super lightweight so don't pack it full of heavy stuff and then try to carry it by the drawer handle.
Else there is not much to say .. the drawer is effectively a Gridfinity grid with a raised front, a slot for the handle and tiny pin to keep said handle in place. Watch for the direction when you slide in the handle - the angle of the pin hole has be correct with the inserted pin slanting downward.
The author marked this model as their own original creation.